SD Card not read after updated to Mountain Lion

macrumors newbie

i've a real problem with my SD card and Mountain lion. since i've updated to the new OS and my memory card is hardly read! .. before updating, it was just enough to insert the memory card to be discoverable automatic on my Desktop and Finder...

Now, it's not seen at all neither on my Desktop nor Finder !

i've changed the card to another new one, but same problem! .. i've plugged it to a windows machine and it was read perfectly !!

Any help on that! .. why i'm facing those troubles since the update? how can i solve that

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